Known as aquagenic urticaria, this condition is said to only affect one out of every 23 million people in the world. Being allergic to water is extremely rare, and most that are allergic to it are confined to their homes. The person is hypersensitive to the ions found in non-distilled water, so most have to be very careful when drinking water, or they drink distilled water.

Teenager Ashleigh Morris can't go swimming, soak in a hot bath or enjoy a shower after a stressful day's work - she's allergic to water. Even sweating brings the 19-year-old out in a painful rash. When Ashleigh gets wet her body explodes in sore, itchy red lumps that take about two hours to ease. She has to wash. But showering is a painful experience and she can only do it for a minute at a time. These brief showers are the only contact Ashleigh has with water. (Link)